<?xml version="1.0" encoding="utf-8"?>
<FilingSummary xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <Version>2.4.0.8</Version>
  <ProcessingTime />
  <ReportFormat>Html</ReportFormat>
  <ContextCount>84</ContextCount>
  <ElementCount>222</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>33</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>4</UnitCount>
  <MyReports>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>101 - Document - Document And Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document And Entity Information</ShortName>
    </Report>
    <Report>
      <IsDefault>true</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>102 - Statement - Condensed Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/CondensedConsolidatedBalanceSheets</Role>
      <ShortName>Condensed Consolidated Balance Sheets</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>103 - Statement - Condensed Consolidated Balance Sheets [Parenthetical]</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/CondensedConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Condensed Consolidated Balance Sheets [Parenthetical]</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>104 - Statement - Condensed Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/CondensedConsolidatedStatementsOfOperations</Role>
      <ShortName>Condensed Consolidated Statements of Operations</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>105 - Statement - Condensed Consolidated Statement of Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/CondensedConsolidatedStatementOfEquity</Role>
      <ShortName>Condensed Consolidated Statement of Equity</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>106 - Statement - Condensed Consolidated Statement of Equity [Parenthetical]</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/CondensedConsolidatedStatementOfEquityParenthetical</Role>
      <ShortName>Condensed Consolidated Statement of Equity [Parenthetical]</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>107 - Statement - Condensed Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/CondensedConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>108 - Disclosure - ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/OrganizationAndSummaryOfSignificantAccountingPolicies</Role>
      <ShortName>ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>109 - Disclosure - CASH AND CASH EQUIVALENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/CashAndCashEquivalents</Role>
      <ShortName>CASH AND CASH EQUIVALENTS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>110 - Disclosure - INVESTMENT SECURITIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/InvestmentSecurities</Role>
      <ShortName>INVESTMENT SECURITIES</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>111 - Disclosure - FAIR VALUE MEASUREMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/FairValueMeasurements</Role>
      <ShortName>FAIR VALUE MEASUREMENTS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>112 - Disclosure - STOCKHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/StockholdersEquity</Role>
      <ShortName>STOCKHOLDERS' EQUITY</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>113 - Disclosure - NOTES PAYABLE</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/NotesPayable</Role>
      <ShortName>NOTES PAYABLE</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>114 - Disclosure - LICENSE AGREEMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/LicenseAgreements</Role>
      <ShortName>LICENSE AGREEMENTS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>115 - Disclosure - RELATED PARTY TRANSACTIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/RelatedPartyTransactions</Role>
      <ShortName>RELATED PARTY TRANSACTIONS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>116 - Disclosure - SUBSEQUENT EVENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/SubsequentEvents</Role>
      <ShortName>SUBSEQUENT EVENTS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>117 - Disclosure - ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>118 - Disclosure - CASH AND CASH EQUIVALENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/CashAndCashEquivalentsTables</Role>
      <ShortName>CASH AND CASH EQUIVALENTS (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>119 - Disclosure - INVESTMENT SECURITIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/InvestmentSecuritiesTables</Role>
      <ShortName>INVESTMENT SECURITIES (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>120 - Disclosure - FAIR VALUE MEASUREMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/FairValueMeasurementsTables</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>121 - Disclosure - STOCKHOLDERS' EQUITY (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/StockholdersEquityTables</Role>
      <ShortName>STOCKHOLDERS' EQUITY (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>122 - Disclosure - NOTES PAYABLE (Tables)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/NotesPayableTables</Role>
      <ShortName>NOTES PAYABLE (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>123 - Disclosure - ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesDetailsTextual</Role>
      <ShortName>ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Textual)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>124 - Disclosure - CASH AND CASH EQUIVALENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/CashAndCashEquivalentsDetails</Role>
      <ShortName>CASH AND CASH EQUIVALENTS (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>125 - Disclosure - INVESTMENT SECURITIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/InvestmentSecuritiesDetails</Role>
      <ShortName>INVESTMENT SECURITIES (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>126 - Disclosure - FAIR VALUE MEASUREMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/FairValueMeasurementsDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>127 - Disclosure - FAIR VALUE MEASUREMENTS (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/FairValueMeasurementsDetails1</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (Details 1)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>128 - Disclosure - FAIR VALUE MEASUREMENTS (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/FairValueMeasurementsDetailsTextual</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (Details Textual)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>129 - Disclosure - STOCKHOLDERS' EQUITY (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/StockholdersEquityDetails</Role>
      <ShortName>STOCKHOLDERS' EQUITY (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>130 - Disclosure - STOCKHOLDERS' EQUITY (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/StockholdersEquityDetails1</Role>
      <ShortName>STOCKHOLDERS' EQUITY (Details 1)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>131 - Disclosure - STOCKHOLDERS' EQUITY (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/StockholdersEquityDetails2</Role>
      <ShortName>STOCKHOLDERS' EQUITY (Details 2)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>132 - Disclosure - STOCKHOLDERS' EQUITY (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/StockholdersEquityDetails3</Role>
      <ShortName>STOCKHOLDERS' EQUITY (Details 3)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>133 - Disclosure - STOCKHOLDERS' EQUITY (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/StockholdersEquityDetailsTextual</Role>
      <ShortName>STOCKHOLDERS' EQUITY (Details Textual)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>134 - Disclosure - NOTES PAYABLE (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/NotesPayableDetails</Role>
      <ShortName>NOTES PAYABLE (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>135 - Disclosure - NOTES PAYABLE (Details Textual)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/NotesPayableDetailsTextual</Role>
      <ShortName>NOTES PAYABLE (Details Textual)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>136 - Disclosure - LICENSE AGREEMENTS (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/LicenseAgreementsDetailsTextual</Role>
      <ShortName>LICENSE AGREEMENTS (Details Textual)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>137 - Disclosure - RELATED PARTY TRANSACTIONS (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/RelatedPartyTransactionsDetailsTextual</Role>
      <ShortName>RELATED PARTY TRANSACTIONS (Details Textual)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>138 - Disclosure - SUBSEQUENT EVENTS (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.tgtherapeuticsinc.com/role/SubsequentEventsDetailsTextual</Role>
      <ShortName>SUBSEQUENT EVENTS (Details Textual)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs>
    <Log type="Info">Element tgtx_RoyaltyPaymentEffectivePercentage had a mix of decimals attribute values: 2 3.</Log>
    <Log type="Info">'Monetary' elements on report '133 - Disclosure - STOCKHOLDERS' EQUITY (Details Textual)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">Process Flow-Through: 102 - Statement - Condensed Consolidated Balance Sheets</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Jun. 30, 2013'</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Dec. 31, 2012'</Log>
    <Log type="Info">Process Flow-Through: 103 - Statement - Condensed Consolidated Balance Sheets [Parenthetical]</Log>
    <Log type="Info">Process Flow-Through: 104 - Statement - Condensed Consolidated Statements of Operations</Log>
    <Log type="Info">Process Flow-Through: 106 - Statement - Condensed Consolidated Statement of Equity [Parenthetical]</Log>
    <Log type="Info">Process Flow-Through: 107 - Statement - Condensed Consolidated Statements of Cash Flows</Log>
  </Logs>
  <InputFiles>
    <File>tgtx-20140630.xml</File>
    <File>tgtx-20140630.xsd</File>
    <File>tgtx-20140630_cal.xml</File>
    <File>tgtx-20140630_def.xml</File>
    <File>tgtx-20140630_lab.xml</File>
    <File>tgtx-20140630_pre.xml</File>
  </InputFiles>
  <SupplementalFiles />
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
